[turbofan] Implemented the TruncateFloat32ToInt64 TurboFan operator.

src/compiler/instruction-selector.cc

Index: src/compiler/instruction-selector.cc
diff --git a/src/compiler/instruction-selector.cc b/src/compiler/instruction-selector.cc
index c4af7e88f8d7e3f36381d4bc61a0e8ccb75c5c8e..299138e70fb6028e827dd20caa9fda1cc4b9d91f 100644
--- a/src/compiler/instruction-selector.cc
+++ b/src/compiler/instruction-selector.cc
@@ -847,6 +847,8 @@ void InstructionSelector::VisitNode(Node* node) {
       return MarkAsWord32(node), VisitChangeFloat64ToInt32(node);
     case IrOpcode::kChangeFloat64ToUint32:
       return MarkAsWord32(node), VisitChangeFloat64ToUint32(node);
+    case IrOpcode::kTruncateFloat32ToInt64:
+      return MarkAsWord64(node), VisitTruncateFloat32ToInt64(node);
     case IrOpcode::kTruncateFloat64ToInt64:
       return MarkAsWord64(node), VisitTruncateFloat64ToInt64(node);
     case IrOpcode::kTruncateFloat64ToUint64:
@@ -1099,6 +1101,11 @@ void InstructionSelector::VisitChangeUint32ToUint64(Node* node) {
 }
 
 
+void InstructionSelector::VisitTruncateFloat32ToInt64(Node* node) {
+  UNIMPLEMENTED();
+}
+
+
 void InstructionSelector::VisitTruncateFloat64ToInt64(Node* node) {
   UNIMPLEMENTED();
 }